Measuring and troweling machine



May 2, 1939. o. R SCHEURER MEASURING AND TROWELING MACHI-NE Filed Dc.

v'27, 1957 2 Sheets-Sheet l imm . lll

in l

May 2, 1939. o. R. scHEURER MEASURING ND TROWELING MACHINE` Filed Dec. 27, 1937 2 Sheets-Sheet 2 @www w@ bis Patented May Z, 1939 UNITED STATE earsur or-Flcs Oliver R. Scheurer, Kankakee, Ill., assigner to J. W. Mortell Company, a corporation of Illinois Application December 27, 1337, Serial No. 181,982

Claims.

This invention relates to mechanism for applying a measured coating of material to a panel, or the like, and more particularly to a machine for applying a heavy viscous scund-deadening composition to a panel such as a door panel for an automobile, or the like.

The primary object of the invention is to provide an automatic machine for applying quickly and uniformly to a panel, a measured amount oi heavy viscous material having an asphalt base, and applying material in the form ci a circular patch which is somewhat thicker at its central portion than at its edge portions.

A further object of the invention is to provide a panel-supporting table which automatically raises the work to the proper position to receive the sound-deadening material.

A further object of the invention is to provide improved mechanism for troweling material.

The invention is illustrated in a preferred, embodiment in the accompanying drawings, in which:

Figure l is a broken sectional view of a machine embodying the invention; Fig. 2, a fragmentary sectional view oi the pneumatic plunger mechanism for automatically operating the valves which control the sound-deadening material before the material is extruded from the machine; Fig. 3, an elevational View oi the rotary distributing device with the troweling-blade attached; Fig. 4, a fragmentary sectional view, taken as indicated at line fi or Fig. 3; Fig. 5, a broken end elevational View oi the same; Fig. 6, an elevational view of a door panel after the sound-deadening material has been applied; and Fig. 7, a sectional view, taken as indicated at line 'i oi Fig. 6.

in the embodiment illustrated, A designates a work-supporting table; B, extrusion mechanism including a valve chamber B', a pneumatic plunger B2, and valve operating mechanism B3; C, rotary distributing mechanism adapted to be d 'iven by motor C; and D, troweling-mechanism.

The panel-supporting table A is shown with a mcvabie supporting plate 3 which is mounted o-n a pneumatic plunger 9 adapted to reciprocate in a pneumatic pressure cylinder i@ which is connected to an air pressure line Il. The upward travel of the plate t is adjustably limited by a spacing sleeve l2 which makes a threaded connection with a cylinder head i3, as shown in Fig. l. The upper end ci the sleeve i2 is oi reduced diameter, indicated at lli, to receive a wrench for adjustment purposes. A locking nut i5 serves to lock the sleeve l2 in adjusted position. The base to be worked upon, such as automobile door panels i6, fit on the plate 8 and` may be moved onto and orf of the table manually or by suitable conveyer means (not shown) when the table is in its lower position.

The measuring and extruding device B pref- Tl5 erably is mounted on a xed supporting plate I1 and is provided with a pneumatic plunger cylinder iii whose lower portion B has been referred to as a valve chamber. A fixed pipe i5 is secured toy the plate il and extends upwardly into the botv"'10 tom ci the cylinder i3. An outlet valve 20 controls the opening to the pipe le and is urged downwardly into closed position by means of a compression spring 2i bearing against a guidemember 22. 215

A material supply line 23 is bolted to the side wall oi the cylinder i3, as indicated at 2, and the communicating opening is controlled by an inlet valve 25 which is urged to closed position by a compresion spring 2e in circling the valve stem. '-20 In the upper portion of the cylinder i8 is provided a plunger 2l the stroke of which is adjustable by means oi a pair of nuts 28 provided on the piston rod which extends through the cylinder head 29. The plunger may be forced downwardly to the limit oi" stroke by means of air supplied through the pressure line 3e which is controlled by valves 3l and 3E. The sound-deadening material which is heavy and viscous enters the valve chamber through the pipe 23 at a pressure bey5:50 tween fifty and seventy-five pounds per square inch when the valve 25 is opened. This pressure forces the plunger 2 upwardly when the air in the line is shut oil and permits a measured amount of material to enter the cylinder lli.

As shown in Figs, l. and 2, the inlet valve 25 and outlet valve 2li are opened and closed alternately by means of the mechanism B3 which includes rock shaft i provided with arms Si and 35 within the cylinder lil. As best shown in Fig. nl() 2, the rock snail @il operated by means of a pneumatic plunger 3E which operates in a cylinder 3l under 'the influence ci pressure from the air line Si The rock shaft 33 has an arm 3Q whichl is linked to the plunger 3% by means of a "4.5 pitman The end oi the arm 355 is shown pro vided with a weight il which augments the force of gravity to shut ofi air to the plunger 2l through the valve 3i and to open the inlet valve 25 while permitting the outlet valve 2t to close under the `5() iniiuence oi' spring 22. The valve 3i is of standard construction and need not be described in detail. Downward movement of the plunger 36 shuts off air to the cylinder i8 from the supply line e2 and opens a port '43 which permits air '55 from the cylinder I8 to escape while the plunger 21 is being forced upwardly by the incoming material. On the other hand, upward movement of the plunger 36 shuts oi the port 43 and permits air from the pressure line 42 to enter the cylinder with a pressure from fty to seventy-five pounds per square inch. Thel act of opening the valve 3| to admit air to the cylinder closes valve 25 and opens the valve 20 so that a measured amount of material in the cylinder I8 will be extruded through the fixed hollow shaft I9.

The distributing device C comprises a hollow fish-tail member 44 whose bottom side is slotted, as indicated at 45, to permit the sound-deadening material to be extruded therethrough onto the base of the panel I 8. The upper end of the member 44 makes a threaded connection with a anged member 46 which is journalled on the shaft I9 and is provided with an adjustable stuffing box 41. The member 4G is bolted to a bearing 48 which is supported on a fixed flange 49 secured to the shaft I9. The upper end of the bearing member 48 is provided with a sheave 5S which is driven by a belt 5I, and by a sheave 52 provided 0n a shaft 53. A speed-reduction gear box 54 is provided to drive the shaft 53 from the motor C and preferably serves to rotate the member 44 at about 46 R. P. M. The member 44 rotates constantly and need not be shut olf while fresh material is entering the valve chamber and a new panel I6 is being moved into position.

On the lower end of the member 44 is a threaded pivot nger 55 about which the distributing device rotates and which serves to limit the upward travel of the panel I6. The troweling-blade, as shown in Figs. 3-5, is in the form of an obtuse angular member having one end pivoted at 56 to the finger 55 by means of a bracket 51 adjustably secured to the finger 55 by means of nuts 58. The opposite end of the troweling-blade D is provided with a vertically extending guide rod 59 which extends through a guide bracket 651 provided on the member 44. A compression spring 6I urges the outer end of the trowelingblade downwardly and the lower end of the rod 59 is provided with a foot 62 adapted to ride on the face of the panel I6.

Preferably the troweling-blade D is adjusted so that in applying a patch 53 of sound-deadening material of sixteen inches in diameter, the patch will be about three-eighths of an inch thick at the center and about one-eighth of an inch thick at its marginal edge portions. This arrangement has proven to give the best sound-deadening results with a given weight of material.

The sound-deadening materials, which usually have an emulsied asphalt base, may vary considerably in viscosity. As indicated above, it is preferred to operate the machine at about 46 R. P. M. Two revolutions of the troweling-de- Vice are sufficient to satisfactorily apply a sounddeadening material of rather thin consistency. If the sound-deadening material is very thick, ve or six revolutions of the troweling-blade are -desirable.

As will be readily understood, the operation of the machine may be entirely controlled by the valve 32. A panel I6 which is to receive a sounddeadening patch, is placed on the table 8 and the valve 32 is opened to admit high pressure air to the cylinders IB, 31, and I8 through pipe lines II, 38, and 30, respectively. The air in cylinder IIIl forces the plunger 9 upwardly and brings the work into position to receive the application of sound-deadening material. At the same time air from the pipe 38 forces the plunger 36 upwardly, closing the valve Z5, opening the valve 20, and opening the valve 3l. The plunger 21 will then be forced downwardly and will extrude a measured amount of material through the constantly rotating distributor head 44 onto the panel 6 where it will be troweled by the blade D. I'he valve 32 is then shut off and the pressure in the system relieved by a bleeder vent 64 which will permit the table 8 to be lowered, the valve 20 to be closed, the valve 25 to be opened, and the plunger 21 forced upwardly by the incoming material.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

I claim:

l. A device of the character set forth, comprising: a hollow shaft provided at one end with a troweling-blade; measuring means for extruding a regulated amount of viscous material through said shaft during each operation of the device to a position adjacent to said blade; and means for rotating said blade to distribute and trowel said material.

2. A device as specified in claim l, in which the shaft is disposed vertically and the lower end of the shaft rotates with the troweling-blade, a portion of said blade being yields'ngly mounted on said shaft for limited vertical movement with respect thereto.

3. A device of the character set forth, comprising: a hollow shaft provided at one end with a troweling-blade; a valve chamber communicating with said hollow shaft; plunger mechanism for extruding a measured amount of material through said valve chamber and shaft to a position adjacent to said blade during each operation of the device; and means for rotating said blade to distribute and trowel said material.

4. A device as specified in claim 3, in which the valve chamber is equipped with an inlet valve to a supply pipe and an outlet valve to the hollow shaft, said valves having springs urging them to closed position, and mechanical means for opening said valves alternately.

5. A device for the purpose set forth, comprising: a measuring device; a fixed hollow vertically disposed shaft depending from said device; a distributing device journalled on said shaft and having at its lower end a troweling-blade; said measuring device having a plunger for extruding a measured amount of viscous material from said distributing device during each stroke of the plunger; and driving-means for rotating said distributing device with respect to said shaft.

6. A device as specified in claim 5, in which the distributing device encloses and is supported by the xed shaft, said device being provided with a sheave and belt adapted to be driven by an electric motor through a speed-reducing mechanism.

7. A device as specified in claim 5, in which the troweling-blade is hingedly mounted on the distributing device and has a free end provided with a guide-member adapted to ride upon the object Worked upon, and a spring disposed so as to urge the free end below the pivoted end.

8. A machine for the purpose set forth, coniprising: a panel supporting table; a troweling device disposed above said table comprising a hollow rotating shaft provided at its lower end with a troWeling-blade, and plunger-mechanism for extruding a measured amount of viscous material through said shalt onto a panel on said table; and fluid pressure-means for lifting said table sufficiently to bring the panel into Contact with the troweling-blade, and for operating said extruding plunger.

9. A device as specied in claim 8, in which the troweling machine has a valve chamber communicating with said hollow shaft, said chamber has a spring closed inlet valve and a spring closed outlet valve to said shaft, mechanism is provided for opening said valves alternately, and said mechanism is operated automatically by the fluid pressure-means.

10. A machine for the purpose set forth, comprising: a panel supporting table; a troweling device disposed above said table comprising a hollow rotating shaft provided at its lower end with a troweling-blade; a valve chamber provided with a spring closed inlet valve to a supply pipe of material under pressure and a spring closed outlet valve to said shaft, mechanism for opening said valves alternately, and a plunger for extruding a measured amount oi" viscous material into the shaft from said chamber; and pneumatic pressure-means for operating said valve mechanism and plunger.

11. A device as specified in claim 10, in which the pressure-means is provided with a control valve for applying and releasing pneumatic pressure to the system manually, said means being arranged so that the application of pneumatic pressure to the system Will close the inlet valve, open the outlet valve, and force the plunger to extrude material from the chamber While release of the pneumatic pressure will close the outlet valve, open the inlet valve and permit the pressure of the incoming material to retract said plunger.

12. A machine for the purpose set forth, comprising: a panel supporting table; a trowelingdevice disposed above said table comprising a hollow rotating shaft provided at its lower end with a trowellng-blade; a valve chamber provided with a spring closed inlet valve to a` supply pipe of material under pressure and a spring closed outlet valve to said shaft, mechanism for opening said valves alternately, and a plunger for extrudng a measured amount of viscous material into the shaft from said chamber; an air lift for raising the table suiiciently to bring a superposed panel into contact with the troweling-blade; and pneumatic pressure-means for operating said valve mechanism, plunger and air lift.

13. A device as specified in claim 12, in which the troweling-device is provided at its lowermost end with a centrally disposed pivot nger adapt-- ed to engage the panel and limit the upper travel of the table.

14. A device as specied in claim 12, in which an auxiliary Valve is provided for delaying the application of pressure to the plunger until the valve mechanism has operated to open the outlet valve.

15. A device as specified in claim 12, in which an auxiliary valve is provided for delaying the application` of pressure to the plunger until the valve mechanism has operated to open the outlet valve, and a pneumatically operable plunger has a cylinder connected to the pressure-means to operate said valve mechanism and auxiliary valve.

OLIVER R. SCHEURER. 

